Tool handle lock



TOOL HANDLE LOCK Sept' 28 1 Filed Julf l, 194e a A q? y j u I Y 'fif/VWQA 7 X \l\ 3/ f4 azjmN-v 4 'illl'rllllll 8. q [.0 a IN'VENTOR PatentedSept. 28, 1948 UNITED STATES PATENT OFFICE Application `luly 1, 1946,Serial No. 680,727

1 Claim.

This invention relates to tools and more particularly to a hammer orsimilar tool head having associated therewith a dog for firmly holdingthe tool head npon a handle and very effectively preventing the headfrom working loose and slipping off of the handle.

One object of the invention is to provide the tool head with a fastenerso formed and so mounted that it may be forced into nrrn grippingengagement with the handle after the head has been applied to thehandle, provision being made for releasing the fastener when lit isdesired to remove a broken handle and apply a new one.

Another object of the invention is to provide the tool head with afastener consisting of dog pivotally mounted in a recess formed in thetool head so that the head may be easily applied to a handle, the dogbeing forced into gripping engagement with the handle by a set screwthreaded through an opening formed in the shank of the tool head andentering the recess for abutting engagement with the pivoted dog.

Another object of the invention is to provide a tool head hlaving afastener so formed and mounted that a handle of conventional form may beapplied to the head.

The invention is illustrated in the accompanying drawings wherein:

Fig. l is a side View of a hammer equipped with the improved fastener.

Fig. 2 is a View showing the hammer head in section and the handle inside elevation and secured in the eye of the headby the improvedfastener.

Fig. 3 is a sectional view taken transversely through Figure 1 along theline 3-.

Fig. 4 is a fragmentary sectional view taken ailong line 4-41 of Figurel.

The improved fastener has been shown in corporated in a hammer head butit will be understood that axes and other similar tools may be equippedwith the improved fastener.

The tool head l has a rearwardly extending shank 2 and longitudinally ofthis shank the head is formed with an eye 3 to receive the taperedforward end portion 4 of a handle 5. Within the shank 2 is alongitudinally extending recess or pocket ii :in which is disposed a dogor gripper 'l which extends longitudinally in the pocket and its frontend is enlarged to form a head 8 through which la pin 9 passes topivotally mount the dog for swinging movement towards and away from thebore When the dog is swung towards the bore 3 it enters a recess ornotch l formed in the forward portion 4 of the handle 5 where it is heldby a set screw Il threaded through an opening l2 formed in the outerside wall of the pocket li. Pressure exerted upon the dog by the setscrew forces the dog into close contacting engagement with the innerwall of the recess or notch Ill and the teeth I3 formed across thehandle-engaging face of the dog will bite into the confronting wall ofthe notch and forni recesses defining teeth i4 with which the teeth i3interengage and firmly hold the handle against rearward movement out ofthe bore. It will thus be seen that the interengaging teeth 53 and lllwill hold the hammer head against 'forward movement cfr" of the handleand that since the rear end of the dog has abutting engagement with ashoulder I5 the head can not shift rearwardly along the handle and causethe front end of the handle to protrude outwardly from the head. When itis desired to remove a broken handle from the head it is merelynecessary to loosen the set screw and the dog may then swing about thepin 9 away from the handle and the bro-ken handle may then be shaken orforced out of the bore 3 of the head and a new handle applied.

Having thus described the invention, what is claimed is:

A tool head formed with a rearwardly extending shank and with a boreextending longitudinally through the shank and the head and taperedtoward its front end for its full length, la handle having a taperedforward end position fitting into the bore through the rear end thereofand having a wedging nt therein, the shank being formed internally witha longitudinally extending recess deepened at its front end to form asocket located at the junction of the shank with the head, and a pinalong its bottom the handle being formed `with a longitudinallyextending recess disposed opposite the recess in the shank and formedwith notches across its inner wa-ll, a latch extending ilongitudinallyin the recess of said shank and formed at its front end with a hinge earcircular in cross section and fitting into said socket with a portionexposed through the open bottom of the socket, said pin passingtransversely through the hinge ear and side walls of the recess :in theshank and pivotally mounting the latch for swinging movement into andout of the recess in the handle, said latch being formed across itsinner side face with forwardly facing teeth for engaging in the notchesof the recess in the handle and securing the head against for-wardmovement olf of the handle, and a set screw threaded through an openingin the Number Date Horton Apr. 6 1875- Number Number Name Date PowersDec. 22, 1903 Fixler June 25, 1906 Fitzgerald Dec. 15, 1914 PurnellSept. 18, 1923 Shepard June 11, 1929 Hogg Dec. 2, 1930 Brock June 19,1934 FOREIGN PATENTS Country Date Germany Nov. 24, 1921

